Qabstractanimation.h:59: error: base class has incomplete type

[pke62]

I am trying to install Qt 5 [5.0.1] on Mac [osx 10.7.5]. The first issue was with qisenum.h, but I found a fix for that. Now I am getting an error:
/Applications/QtSDK_5.0.1/5.0.1/clang_64/include/QtCore/qabstractanimation.h:59: error: base class has incomplete type
class Q_CORE_EXPORT QAbstractAnimation : public QObject

                                            ~~~~~~~^~~~~~~

I've tried searching the forum with no success.

Any ideas?